[valyan]

Пытаюсь сделать так

var arr = new Array();
var arr = [['Gbwwf',2], ['Gbwwf',2], ['Gbwwf',2], ['Gbdj',2], ['Gbdj',2]];
document.write(arr + '<br />');
var f = 0;
var arr2 = new Array(
 [, ]
 );
 
for (var i=0; i<arr.length; i++) {
    for (var j=0; j<arr.length; j++) {
        if (arr[i, 0] == arr[j, 0]) {
            if(arr2[arr[i, 0], 0]) {
                arr2[arr[i, 0], 0] += 1;
            } else {
                arr2[arr[i, 0], 0] = 1;
            }
            arr.splice(j, 1)
            j--;
        }
    }
}